Apple iPhone 6s Plus

Power and Battery

As specified by Apple

Talk time: up to 24 h with UMTS (3G)Internet use: up to 12 h with 3G, LTE or WLANHD video playback: up to 14 hAudio playback: up to 80 hStandby time: up to 16 daysBuilt-in rechargeable lithium-ion battery with 2750 mAhCharging via USB to computer system or power adapter

My own Experience

I will add some data soon, but the device is too new for writing accurate data now.To make analyse possible I make screenshots every day since day one and I write the charging times into my calendar.

Advance information:Battery running time depents from how you are using the iPhone. By very low use but hearing music 3 hours daily it lasts 2 days with approx. 40 % remain.In order to avoid stressing the battery I usually charge it up to an maximum of 85 % and use it until a remain capacity of approx. 30 %.Therefore my indications of battery performance are not excessive.